Controlling red upconversion luminescence in Gd2O3:Yb3+–Er3+nanoparticles by changing the different atmosphere

Zhang, Shengjun; Zhou, Jiajia; Wu, Ruozhen; Lei, Lei; Xiao, Zhen; Zhang, Junjie; Xu, Shiqing

doi:10.1039/c6ra22754f

Cited by 3 publications

(1 citation statement)

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“…Owing to the paramagnetic behavior of Gd 3+ ions, Gd 2 O 3 serves as a promising host for the UC process. − For the UC process, Yb 3+ and Ho 3+ were used as an activator and sensitizer, respectively. We first synthesized Li + -free Gd 2 O 3 :Yb 3+ /Ho 3+ crystals by the sol–gel technique using a previously reported method since the reported technique is known to produce materials with the crystalline state and superior phase purity .…”

Section: Resultsmentioning

confidence: 99%

Tracing Local Disorder in Near-Infrared-Upconverting Crystals of Li⁺-Doped Gd₂O₃ through the Gd(III)-O Bond Distance

et al. 2022

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Using atomic pair distribution function (PDF) analysis of high-energy synchrotron total scattering, the current study addresses how an imparted local disorder in near-infrared-upconverting (UC) crystals dictates the concerned bulk properties. Aiming to perturb the local crystal field symmetry around the activator ions, Li + was incorporated in varying amounts within the UC crystals of Gd 2 O 3 /Yb 3+ /Ho 3+ . The respective photoluminescence (upconversion luminescence, UCL) intensities of the crystals got enhanced first and then diminished after a certain Li + concentration. The phase of the crystal remained constant as the cubic Ia-3 space group in all the samples with no significant changes in average structures as obtained from the Rietveld refinement of synchrotron experiments. Results from extended X-ray absorption fine structure indicated some changes at the atomic level. A comparative analysis among the Li + -incorporated crystals was considered. Systematic PDF analysis revealed the appearance of local disorder, which was connected with the Gd(III)-O bond distances in some way. The extent of local disorder followed the variation trend of UCL intensities. When Gd1-O and Gd2-O approximately approached their respective shortest and longest limits among the Li + -incorporated crystals, the corresponding local disorder appeared to be maximum with the corresponding crystal showing the highest UCL intensity. The relative variation of Gd−O bond distances and hence the extent of local disorder was found to get manifested in the respective tensile lattice strains so generated. Through rationale and earlier published evidence, the study attempted to hypothesize that local disorder is fundamentally connected with the lattice strain in UC crystals at a significantly higher concentration of a symmetry perturbing agent.

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Section: Resultsmentioning

confidence: 99%

Tracing Local Disorder in Near-Infrared-Upconverting Crystals of Li⁺-Doped Gd₂O₃ through the Gd(III)-O Bond Distance

et al. 2022

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Fast synthesis of sub-10 nm β-NaYF4:Yb3+, Er3+@NaYF4 core-shell upconversion nanocrystals mediated by oleate ligands

Xiao

Liao

et al. 2018

Materials Research Bulletin

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Photoluminescence study in Gd2O3: Er3+/Yb3+ nanocrystal as a promising sensing probe

Maurya

Krishna

Upadhaya

et al. 2019

Advances in Basic Science (Icabs 2019)

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Controlling red upconversion luminescence in Gd₂O₃:Yb³⁺–Er³⁺nanoparticles by changing the different atmosphere

Abstract: Upconversion luminescence properties were investigated by emission intensityvs.excitation power (double logarithmic relationship) and temperature dependent emission spectroscopy.

Cited by 3 publications

References 50 publications

Tracing Local Disorder in Near-Infrared-Upconverting Crystals of Li⁺-Doped Gd₂O₃ through the Gd(III)-O Bond Distance

Tracing Local Disorder in Near-Infrared-Upconverting Crystals of Li⁺-Doped Gd₂O₃ through the Gd(III)-O Bond Distance

Fast synthesis of sub-10 nm β-NaYF4:Yb3+, Er3+@NaYF4 core-shell upconversion nanocrystals mediated by oleate ligands

Photoluminescence study in Gd2O3: Er3+/Yb3+ nanocrystal as a promising sensing probe

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Controlling red upconversion luminescence in Gd2O3:Yb3+–Er3+nanoparticles by changing the different atmosphere

Abstract: Upconversion luminescence properties were investigated by emission intensityvs.excitation power (double logarithmic relationship) and temperature dependent emission spectroscopy.

Cited by 3 publications

References 50 publications

Tracing Local Disorder in Near-Infrared-Upconverting Crystals of Li+-Doped Gd2O3 through the Gd(III)-O Bond Distance

Tracing Local Disorder in Near-Infrared-Upconverting Crystals of Li+-Doped Gd2O3 through the Gd(III)-O Bond Distance

Fast synthesis of sub-10 nm β-NaYF4:Yb3+, Er3+@NaYF4 core-shell upconversion nanocrystals mediated by oleate ligands

Photoluminescence study in Gd2O3: Er3+/Yb3+ nanocrystal as a promising sensing probe

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Controlling red upconversion luminescence in Gd₂O₃:Yb³⁺–Er³⁺nanoparticles by changing the different atmosphere

Tracing Local Disorder in Near-Infrared-Upconverting Crystals of Li⁺-Doped Gd₂O₃ through the Gd(III)-O Bond Distance

Tracing Local Disorder in Near-Infrared-Upconverting Crystals of Li⁺-Doped Gd₂O₃ through the Gd(III)-O Bond Distance

Fast synthesis of sub-10 nm β-NaYF4:Yb3+, Er3+@NaYF4 core-shell upconversion nanocrystals mediated by oleate ligands